Spotify.NET/SpotifyAPI/Local/SpotifyLocalAPI.cs
2016-08-28 22:35:47 +02:00

349 lines
13 KiB
C#

using SpotifyAPI.Local.Models;
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using System.Timers;
namespace SpotifyAPI.Local
{
public class SpotifyLocalAPI : IDisposable
{
[DllImport("user32.dll")]
private static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
private bool _listenForEvents;
public bool ListenForEvents
{
get
{
return _listenForEvents;
}
set
{
_listenForEvents = value;
_eventTimer.Enabled = value;
}
}
private ISynchronizeInvoke _synchronizingObject;
public ISynchronizeInvoke SynchronizingObject
{
get
{
return _synchronizingObject;
}
set
{
_synchronizingObject = value;
_eventTimer.SynchronizingObject = value;
}
}
private const byte VkMediaNextTrack = 0xb0;
private const byte VkMediaPrevTrack = 0xb1;
private const int KeyeventfExtendedkey = 0x1;
private const int KeyeventfKeyup = 0x2;
private readonly RemoteHandler _rh;
private Timer _eventTimer;
private StatusResponse _eventStatusResponse;
public event EventHandler<TrackChangeEventArgs> OnTrackChange;
public event EventHandler<PlayStateEventArgs> OnPlayStateChange;
public event EventHandler<VolumeChangeEventArgs> OnVolumeChange;
public event EventHandler<TrackTimeChangeEventArgs> OnTrackTimeChange;
public SpotifyLocalAPI(int timerIntervall = 50)
{
_rh = new RemoteHandler();
AttachTimer(timerIntervall);
}
private void AttachTimer(int intervall)
{
_eventTimer = new Timer
{
Interval = intervall,
AutoReset = false,
Enabled = false
};
_eventTimer.Elapsed += ElapsedTick;
}
private void ElapsedTick(object sender, ElapsedEventArgs e)
{
if (_eventStatusResponse == null)
{
_eventStatusResponse = GetStatus();
_eventTimer.Start();
return;
}
StatusResponse newStatusResponse = GetStatus();
if (newStatusResponse == null)
{
_eventTimer.Start();
return;
}
if (!newStatusResponse.Running && newStatusResponse.Track == null)
{
_eventTimer.Start();
return;
}
if (newStatusResponse.Track != null && _eventStatusResponse.Track != null)
{
if (newStatusResponse.Track.TrackResource?.Uri != _eventStatusResponse.Track.TrackResource?.Uri)
{
OnTrackChange?.Invoke(this, new TrackChangeEventArgs()
{
OldTrack = _eventStatusResponse.Track,
NewTrack = newStatusResponse.Track
});
}
}
if (newStatusResponse.Playing != _eventStatusResponse.Playing)
{
OnPlayStateChange?.Invoke(this, new PlayStateEventArgs()
{
Playing = newStatusResponse.Playing
});
}
if (newStatusResponse.Volume != _eventStatusResponse.Volume)
{
OnVolumeChange?.Invoke(this, new VolumeChangeEventArgs()
{
OldVolume = _eventStatusResponse.Volume,
NewVolume = newStatusResponse.Volume
});
}
if (newStatusResponse.PlayingPosition != _eventStatusResponse.PlayingPosition)
{
OnTrackTimeChange?.Invoke(this, new TrackTimeChangeEventArgs()
{
TrackTime = newStatusResponse.PlayingPosition
});
}
_eventStatusResponse = newStatusResponse;
_eventTimer.Start();
}
/// <summary>
/// Connects with Spotify. Needs to be called before all other SpotifyAPI functions
/// </summary>
/// <returns>Returns true, if it was successful, false if not</returns>
public Boolean Connect()
{
return _rh.Init();
}
/// <summary>
/// Update and returns the new StatusResponse from the Spotify-Player
/// </summary>
/// <returns>An up-to-date StatusResponse</returns>
public StatusResponse GetStatus()
{
return _rh.GetNewStatus();
}
/// <summary>
/// Mutes Spotify (Requires Windows 7 or newer)
/// </summary>
public void Mute()
{
//Windows < Windows Vista Check
if (Environment.OSVersion.Version.Major < 6)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
//Windows Vista Check
if (Environment.OSVersion.Version.Major == 6)
if(Environment.OSVersion.Version.Minor == 0)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
VolumeMixerControl.MuteSpotify(true);
}
/// <summary>
/// Unmutes Spotify (Requires Windows 7 or newer)
/// </summary>
public void UnMute()
{
//Windows < Windows Vista Check
if (Environment.OSVersion.Version.Major < 6)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
//Windows Vista Check
if (Environment.OSVersion.Version.Major == 6)
if (Environment.OSVersion.Version.Minor == 0)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
VolumeMixerControl.MuteSpotify(false);
}
/// <summary>
/// Checks whether Spotify is muted in the Volume Mixer control (required Windows 7 or newer)
/// </summary>
/// <returns>Null if an error occured, otherwise the muted state</returns>
public bool IsSpotifyMuted()
{
//Windows < Windows Vista Check
if (Environment.OSVersion.Version.Major < 6)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
//Windows Vista Check
if (Environment.OSVersion.Version.Major == 6)
if (Environment.OSVersion.Version.Minor == 0)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
return VolumeMixerControl.IsSpotifyMuted();
}
/// <summary>
/// Sets the Volume Mixer volume (requires Windows 7 or newer)
/// </summary>
/// <param name="volume">A value between 0 and 100</param>
public void SetSpotifyVolume(float volume = 100)
{
//Windows < Windows Vista Check
if (Environment.OSVersion.Version.Major < 6)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
//Windows Vista Check
if (Environment.OSVersion.Version.Major == 6)
if (Environment.OSVersion.Version.Minor == 0)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
if (volume < 0 || volume > 100)
throw new ArgumentOutOfRangeException(nameof(volume));
VolumeMixerControl.SetSpotifyVolume(volume);
}
/// <summary>
/// Return the Volume Mixer volume of Spotify (requires Windows 7 or newer)
/// </summary>
/// <returns>Null if an error occured, otherwise a float between 0 and 100</returns>
public float GetSpotifyVolume()
{
//Windows < Windows Vista Check
if (Environment.OSVersion.Version.Major < 6)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
//Windows Vista Check
if (Environment.OSVersion.Version.Major == 6)
if (Environment.OSVersion.Version.Minor == 0)
throw new NotSupportedException("This feature is only available on Windows 7 or newer");
return VolumeMixerControl.GetSpotifyVolume();
}
/// <summary>
/// Pause function
/// </summary>
public void Pause()
{
_rh.SendPauseRequest();
}
/// <summary>
/// Play function
/// </summary>
public void Play()
{
_rh.SendPlayRequest();
}
/// <summary>
/// Simulates a KeyPress
/// </summary>
/// <param name="keyCode">The keycode for the represented Key</param>
internal void PressKey(byte keyCode)
{
keybd_event(keyCode, 0x45, KeyeventfExtendedkey, 0);
keybd_event(keyCode, 0x45, KeyeventfExtendedkey | KeyeventfKeyup, 0);
}
/// <summary>
/// Plays a Spotify URI within an optional context.
/// </summary>
/// <param name="uri">The Spotify URI</param>
/// <param name="context">The context in which to play the specified <paramref name="uri"/>. </param>
/// <remarks>
/// Contexts are basically a queue in spotify. a song can be played within a context, meaning that hitting next / previous would lead to another song. Contexts are leveraged by widgets as described in the "Multiple tracks player" section of the following documentation page: https://developer.spotify.com/technologies/widgets/spotify-play-button/
/// </remarks>
public void PlayURL(string uri, string context = "")
{
_rh.SendPlayRequest(uri, context);
}
/// <summary>
/// Adds a Spotify URI to the Queue
/// </summary>
/// <param name="uri">The Spotify URI</param>
[Obsolete("This method doesn't work with the current spotify version.")]
public void AddToQueue(string uri)
{
_rh.SendQueueRequest(uri);
}
/// <summary>
/// Skips the current song (Using keypress simulation)
/// </summary>
public void Skip()
{
PressKey(VkMediaNextTrack);
}
/// <summary>
/// Emulates the "Previous" Key (Using keypress simulation)
/// </summary>
public void Previous()
{
PressKey(VkMediaPrevTrack);
}
/// <summary>
/// Checks if Spotify is running
/// </summary>
/// <returns>True, if it's running, false if not</returns>
public static Boolean IsSpotifyRunning()
{
return Process.GetProcessesByName("spotify").Length >= 1;
}
/// <summary>
/// Checks if Spotify's WebHelper is running (Needed for API Calls)
/// </summary>
/// <returns>True, if it's running, false if not</returns>
public static Boolean IsSpotifyWebHelperRunning()
{
return Process.GetProcessesByName("spotifywebhelper").Length >= 1;
}
/// <summary>
/// Runs Spotify
/// </summary>
public static void RunSpotify()
{
if (!IsSpotifyRunning() && File.Exists(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\spotify.exe")))
Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\spotify.exe"));
}
/// <summary>
/// Runs Spotify's WebHelper
/// </summary>
public static void RunSpotifyWebHelper()
{
if (!IsSpotifyWebHelperRunning() && File.Exists(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\data\spotifywebhelper.exe")))
{
Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\data\spotifywebhelper.exe"));
}
else if (!IsSpotifyWebHelperRunning() && File.Exists(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\spotifywebhelper.exe")))
{
Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"spotify\spotifywebhelper.exe"));
}
}
public void Dispose()
{
if (_eventTimer == null)
return;
_eventTimer.Enabled = false;
_eventTimer.Elapsed -= ElapsedTick;
}
}
}